From f28491e0a6c46d99cbbef0f8ef7e314afa2359c8 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Mon, 16 Dec 2013 13:24:27 -0500 Subject: Btrfs: move the extent buffer radix tree into the fs_info I need to create a fake tree to test qgroups and I don't want to have to setup a fake btree_inode. The fact is we only use the radix tree for the fs_info, so everybody else who allocates an extent_io_tree is just wasting the space anyway. This patch moves the radix tree and its lock into btrfs_fs_info so there is less stuff I have to fake to do qgroup sanity tests. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/ctree.h | 4 ++++ fs/btrfs/disk-io.c | 14 ++++---------- fs/btrfs/extent_io.c | 47 +++++++++++++++++++++++------------------------ fs/btrfs/extent_io.h | 8 +++----- 4 files changed, 34 insertions(+), 39 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 7158c97fdc5..a924274a503 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1659,6 +1659,10 @@ struct btrfs_fs_info { spinlock_t reada_lock; struct radix_tree_root reada_tree; + /* Extent buffer radix tree */ + spinlock_t buffer_lock; + struct radix_tree_root buffer_radix; + /* next backup root to be overwritten */ int backup_root_index; diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 4ecee0a009c..4a1871cf797 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1089,21 +1089,13 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize) { - struct inode *btree_inode = root->fs_info->btree_inode; - struct extent_buffer *eb; - eb = find_extent_buffer(&BTRFS_I(btree_inode)->io_tree, bytenr); - return eb; + return find_extent_buffer(root->fs_info, bytenr); } struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize) { - struct inode *btree_inode = root->fs_info->btree_inode; - struct extent_buffer *eb; - - eb = alloc_extent_buffer(&BTRFS_I(btree_inode)->io_tree, - bytenr, blocksize); - return eb; + return alloc_extent_buffer(root->fs_info, bytenr, blocksize); } @@ -2145,6 +2137,7 @@ int open_ctree(struct super_block *sb, mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC); + INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC); INIT_LIST_HEAD(&fs_info->trans_list); INIT_LIST_HEAD(&fs_info->dead_roots); INIT_LIST_HEAD(&fs_info->delayed_iputs); @@ -2158,6 +2151,7 @@ int open_ctree(struct super_block *sb, spin_lock_init(&fs_info->free_chunk_lock); spin_lock_init(&fs_info->tree_mod_seq_lock); spin_lock_init(&fs_info->super_lock); + spin_lock_init(&fs_info->buffer_lock); rwlock_init(&fs_info->tree_mod_log_lock); mutex_init(&fs_info->reloc_mutex); seqlock_init(&fs_info->profiles_lock); diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 92a3ad4656a..2fa23b57d8d 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -194,11 +194,9 @@ void extent_io_tree_init(struct extent_io_tree *tree, struct address_space *mapping) { tree->state = RB_ROOT; - INIT_RADIX_TREE(&tree->buffer, GFP_ATOMIC); tree->ops = NULL; tree->dirty_bytes = 0; spin_lock_init(&tree->lock); - spin_lock_init(&tree->buffer_lock); tree->mapping = mapping; } @@ -3489,6 +3487,7 @@ static int write_one_eb(struct extent_buffer *eb, struct extent_page_data *epd) { struct block_device *bdev = fs_info->fs_devices->latest_bdev; + struct extent_io_tree *tree = &BTRFS_I(fs_info->btree_inode)->io_tree; u64 offset = eb->start; unsigned long i, num_pages; unsigned long bio_flags = 0; @@ -3506,7 +3505,7 @@ static int write_one_eb(struct extent_buffer *eb, clear_page_dirty_for_io(p); set_page_writeback(p); - ret = submit_extent_page(rw, eb->tree, p, offset >> 9, + ret = submit_extent_page(rw, tree, p, offset >> 9, PAGE_CACHE_SIZE, 0, bdev, &epd->bio, -1, end_bio_extent_buffer_writepage, 0, epd->bio_flags, bio_flags); @@ -4370,10 +4369,9 @@ static inline void btrfs_release_extent_buffer(struct extent_buffer *eb) __free_extent_buffer(eb); } -static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, - u64 start, - unsigned long len, - gfp_t mask) +static struct extent_buffer * +__alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start, + unsigned long len, gfp_t mask) { struct extent_buffer *eb = NULL; @@ -4382,7 +4380,7 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree, return NULL; eb->start = start; eb->len = len; - eb->tree = tree; + eb->fs_info = fs_info; eb->bflags = 0; rwlock_init(&eb->lock); atomic_set(&eb->write_locks, 0); @@ -4514,13 +4512,14 @@ static void mark_extent_buffer_accessed(struct extent_buffer *eb) } } -struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, - u64 start) +struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info, + u64 start) { struct extent_buffer *eb; rcu_read_lock(); - eb = radix_tree_lookup(&tree->buffer, start >> PAGE_CACHE_SHIFT); + eb = radix_tree_lookup(&fs_info->buffer_radix, + start >> PAGE_CACHE_SHIFT); if (eb && atomic_inc_not_zero(&eb->refs)) { rcu_read_unlock(); mark_extent_buffer_accessed(eb); @@ -4531,7 +4530,7 @@ struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, return NULL; } -struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, +struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start, unsigned long len) { unsigned long num_pages = num_extent_pages(start, len); @@ -4540,16 +4539,15 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, struct extent_buffer *eb; struct extent_buffer *exists = NULL; struct page *p; - struct address_space *mapping = tree->mapping; + struct address_space *mapping = fs_info->btree_inode->i_mapping; int uptodate = 1; int ret; - - eb = find_extent_buffer(tree, start); + eb = find_extent_buffer(fs_info, start); if (eb) return eb; - eb = __alloc_extent_buffer(tree, start, len, GFP_NOFS); + eb = __alloc_extent_buffer(fs_info, start, len, GFP_NOFS); if (!eb) return NULL; @@ -4604,12 +4602,13 @@ again: if (ret) goto free_eb; - spin_lock(&tree->buffer_lock); - ret = radix_tree_insert(&tree->buffer, start >> PAGE_CACHE_SHIFT, eb); - spin_unlock(&tree->buffer_lock); + spin_lock(&fs_info->buffer_lock); + ret = radix_tree_insert(&fs_info->buffer_radix, + start >> PAGE_CACHE_SHIFT, eb); + spin_unlock(&fs_info->buffer_lock); radix_tree_preload_end(); if (ret == -EEXIST) { - exists = find_extent_buffer(tree, start); + exists = find_extent_buffer(fs_info, start); if (exists) goto free_eb; else @@ -4662,14 +4661,14 @@ static int release_extent_buffer(struct extent_buffer *eb) WARN_ON(atomic_read(&eb->refs) == 0); if (atomic_dec_and_test(&eb->refs)) { if (test_and_clear_bit(EXTENT_BUFFER_IN_TREE, &eb->bflags)) { - struct extent_io_tree *tree = eb->tree; + struct btrfs_fs_info *fs_info = eb->fs_info; spin_unlock(&eb->refs_lock); - spin_lock(&tree->buffer_lock); - radix_tree_delete(&tree->buffer, + spin_lock(&fs_info->buffer_lock); + radix_tree_delete(&fs_info->buffer_radix, eb->start >> PAGE_CACHE_SHIFT); - spin_unlock(&tree->buffer_lock); + spin_unlock(&fs_info->buffer_lock); } else { spin_unlock(&eb->refs_lock); } diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 92e4347315e..58b27e5ab52 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -95,12 +95,10 @@ struct extent_io_ops { struct extent_io_tree { struct rb_root state; - struct radix_tree_root buffer; struct address_space *mapping; u64 dirty_bytes; int track_uptodate; spinlock_t lock; - spinlock_t buffer_lock; struct extent_io_ops *ops; }; @@ -131,7 +129,7 @@ struct extent_buffer { unsigned long map_start; unsigned long map_len; unsigned long bflags; - struct extent_io_tree *tree; + struct btrfs_fs_info *fs_info; spinlock_t refs_lock; atomic_t refs; atomic_t io_pages; @@ -267,11 +265,11 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); void set_page_extent_mapped(struct page *page); -struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, +struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start, unsigned long len); struct extent_buffer *alloc_dummy_extent_buffer(u64 start, unsigned long len); struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src); -struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, +struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info, u64 start); void free_extent_buffer(struct extent_buffer *eb); void free_extent_buffer_stale(struct extent_buffer *eb); -- cgit v1.2.3-70-g09d2